An emotional Mark Wahlberg, who also seems a little tired, reveals he isn't comfortable with nudity; Michael Fassbender talks about his penis; while Sarah Silverman says Elvis saved her life; and Laura Mvula makes her TV debut singing live in the studio.

Mark Wahlberg, talking about attending the upcoming Oscars where he is presenting an award, says, "I have to show up with Ted. He'll do his thing and I will try and extinguish the fires."

Talking more about Ted and the moment he broke the news to his wife that he was taking the movie, he says, "We were driving to the Academy awards for The Fighter, and I'm like 'Babe, I've finally found the next movie. It's going to be big, it's about me and a teddy bear.' She said, 'You idiot? You are going to the Academy Awards for the last time. Your career will be over.'"

Asked if his children understood why they couldn't see Ted, he says, "Absolutely not. They're thinking, 'Daddy, finally there is a movie with you and a teddy bear and you're laughing and having fun.' Clearly Ted is really inappropriate and my wife is very conservative. I'm thinking, 'the boys are eight and nine, we'll show them' and she's like, '24, 25 and we're never showing our daughters', which I completely agree with."

Flirting playfully with Sarah Silverman, the conversation turns to nudity on screen and Mark says, "My wife does not like to see me in those kind of roles. I don't like to take those kind of roles on. I don't feel that comfortable." Asked if he could see the roles reversed, he says, "I couldn't imagine my wife doing a scene like that. It's every man's worst fear."

Michael Fassbender, talking about his sexually explicit movie Shame, and asked why he thought it was a good idea to invite his parents to the premiere, says: "My mother ended up not turning up so I didn't have to worry about her but my dad sat behind me and he patted me on the shoulder at the end. It was kind of awkward but they're open minded people."

Asked if he was surprised that his penis had its own Twitter account and that George Clooney talked about it at the Golden Globes, he says, "I guess it reflects what our relationship with that is. People are still awkward about it and uncomfortable."

Michael reveals, "My dad follows my career and tells me what I am doing before I know what I am doing. He has me on Google alerts. It's sweet and creepy at the same time!" Asked if his dad finds out bizarre things about him, he says, "Yes. And sometime they are true!"

Asked if there will be a sequel to Prometheus he says, "I don't know. If they make enough money on the first one they will do another."

Sarah, talking about her fashion disaster on the red carpet, says, "I'm not a good fashion person. I feel like I am though. I was nominated for an Emmy and Badgley Mischka approached me to make me a dress and said I could help design it. I was so excited and kept adding things like pockets and stuff. It was really bad. I looked like I was in a really bad renaissance fair. It looked really wide and weird and they took their name off the dress."

Constantly interrupted by Mark, and describing the story telling process as "torture," Sarah valiantly endeavours to get to the punch line of a childhood bedwetting tale, "Elvis saved my life," she tells Graham. "I had a sleep over when I was six and had to borrow pyjamas. Of course I wet myself and the mother steps right in the wet pyjamas and she shouts, 'who did this?' and I'm paralysed with fear and just when I think she is going to kill me the husband walks in and says, 'Elvis Presley died."

Laura Mvula performs Green Garden live in the studio before joining Graham for a chat about her upcoming tour and her former career as a music teacher, "I sort of fell into it. It was a great challenge and really tough. I wasn't a good teacher."

And finally, Mark takes over the Red Chair lever as one poor member of the audience struggles to get to the end of her story...